urbit/i/n/z.h
2014-11-07 14:54:59 -08:00

34 lines
1.0 KiB
C

/* i/n/z.h
**
** This file is in the public domain.
*/
/** Memoization.
***
*** The memo cache is keyed by an arbitrary symbolic function
*** and a noun argument to that (logical) function. Functions
*** are predefined by C-level callers, but 0 means nock.
***
*** The memo cache is within its road and dies when it falls.
***
*** Memo functions RETAIN keys and transfer values.
**/
/* u3z_find*(): find in memo cache.
*/
u3_weak u3z_find(c3_m, u3_noun);
u3_weak u3z_find_2(c3_m, u3_noun, u3_noun);
u3_weak u3z_find_3(c3_m, u3_noun, u3_noun, u3_noun);
u3_weak u3z_find_4(c3_m, u3_noun, u3_noun, u3_noun, u3_noun);
/* u3z_save*(): save in memo cache.
*/
u3_noun u3z_save(c3_m, u3_noun, u3_noun);
u3_noun u3z_save_2(c3_m, u3_noun, u3_noun, u3_noun);
u3_noun u3z_save_3(c3_m, u3_noun, u3_noun, u3_noun, u3_noun);
u3_noun u3z_save_4(c3_m, u3_noun, u3_noun, u3_noun, u3_noun, u3_noun);
/* u3z_uniq(): uniquify with memo cache.
*/
u3_noun
u3z_uniq(u3_noun som);